The teams I work on generate and share ideas by sketching together. When I see a few lightbulbs going off in a conversation, I call for an impromptu sketching session. Setting up the scenario, open the timer, and find a nice track to play takes too long.

Zeebn removes the decision making time out of how long to sketch for and what track to play. It sounds simple but is a lot to think about when your mind is focused on the actual task at hand. We optimized for for safari-mobile since this activity usually usually happens ad-hoc.